HIGH-PRESSURE SYNTHESIS OF USEFUL COMPLEX SULFIDES

有用的复合硫化物的高压合成

• 批准号: 11650690
• 负责人: KUSABA Keiji
• 金额: $ 2.24万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650690/
• 关键词: sulfur; high-pressure; phase transitions; synchrotron radiations; sulfide; chalcogenide compounds; 高温高圧; その場観測

High-pressure and high-temperature behavior of sulfur, iron sulfide (FeS) and zinc chalcogenide (ZnX ; X=O, S, Se and Te) was investigated by in-situ X-ray observation method and quenching method. Pressure and temperature range for the investigation was up to 16GPa and 1000℃. The melting curve of sulfur under high-pressure condition up to 12GPa was determined, which was important information for synthesis of sulfides under high-pressure condition. Several interesting physical properties of sulfides were also found, compared with oxides. In the case of FeS, a second-order phase transition was found, which may be explained by a spin ordering of iron atoms. A new highpressure phase of ZnSe with the B9 (HgS)-type structure was found as predicted by an ab-initio calculation. On the basis of the melting curve of sulfur and the properties of sulfides, synthesis of several complex sulfides (CaTiS_3, SrTiS_3 and BaTiS_3) was tried under high-pressure and high-temperature conditions.

采用原位X射线观察法和淬火法研究了硫、硫化铁（FeS）和锌硫属化物（ZnX ; X=O，S，Se和Te）的高温高压行为。研究的压力和温度范围达16 GPa和1000℃。测定了硫在12 GPa以下高压条件下的熔化曲线，为高压条件下硫的合成提供了重要信息。与氧化物相比，还发现了硫化物的一些有趣的物理性质。在FeS的情况下，一个二级相变被发现，这可能是由铁原子的自旋有序解释。通过从头计算发现了一种新的具有B 9（HgS）型结构的ZnSe高压相。根据硫的熔化曲线和硫化物的性质，在高温高压条件下合成了CaTiS_3、SrTiS_3和BaTiS_3等复合硫化物。

项目成果

K.Kusaba: "A new High-pressure phase of Zn Se with B9-type structure"63. 651-655 (2002)

K.Kusaba：“具有 B9 型结构的新型高压硒化锌相”63。

Keiji KUSABA,: "HIGH-PRESSURE PHASES OF V_2O_5 : an application of in-situ X-ray observation method to high-pressure synthesis of materials"J.Crystal Growth. (in press).

Keiji KUSABA，：“V_2O_5 的高压相：原位 X 射线观察方法在材料高压合成中的应用”J.Crystal Growth。

Keiji KUSABA: "Phase transitions of sulfur under high pressure and temperature"Photon Factory Activity report. B17. 228-228 (2000)

Keiji KUSABA：“高压高温下硫的相变”光子工厂活动报告。

K.Kusaba: "High pressure phase of V_2 O5 : An application of in-sila x-ray observation method to high-pressune synthesis of metal"J.Cryst.Growth. 229. 467-471 (2001)

K.Kusaba：“V_2 O5 的高压相：硅内 X 射线观察方法在金属高压合成中的应用”J.Cryst.Growth。

Keiji KUSABA: "High pressure phases of V205:An application of in-situ X-ray observation Method to high-pressure synthesis of materials"J. Cryst. Growth. 229. 467-471 (2001)

Keiji KUSABA：“V205的高压相：原位X射线观察方法在材料高压合成中的应用”J。